diff --git a/docs/administration/config-cheat-sheet.md b/docs/administration/config-cheat-sheet.md
index 499879ff..18395987 100644
--- a/docs/administration/config-cheat-sheet.md
+++ b/docs/administration/config-cheat-sheet.md
@@ -224,6 +224,7 @@ The following configuration set `Content-Type: application/vnd.android.package-a
 - `DEFAULT_THEME`: **gitea-auto**: Set the default theme for the Gitea installation, custom themes could be provided by `{CustomPath}/public/assets/css/theme-*.css`.
 - `SHOW_USER_EMAIL`: **true**: Whether the email of the user should be shown in the Explore Users page.
 - `THEMES`: **_empty_**: All available themes by `{CustomPath}/public/assets/css/theme-*.css`. Allow users select personalized themes.
+- `FILE_ICON_THEME`: **material**: The icons for file list (basic/material).
 - `MAX_DISPLAY_FILE_SIZE`: **8388608**: Max size of files to be displayed (default is 8MiB)
 - `AMBIGUOUS_UNICODE_DETECTION`: **true**: Detect ambiguous unicode characters in file contents and show warnings on the UI
 - `REACTIONS`: All available reactions users can choose on issues/prs and comments